JP6915942B2 - Battery pack with latch relay capable of real-time state control, latch relay state control method, and latch relay capable of real-time state control - Google Patents

Description

This application claims the benefit of priority under Korean Patent Application No. 10-2018-0063417 dated June 01, 2018, and all the contents disclosed in the document of the above Korean patent application are one of the present specification. Included as a part.

The present invention relates to a latch relay capable of real-time state control, a state control method of the latch relay, and a battery pack including a latch relay capable of real-time state control. The normal operation status is monitored in real time through whether or not the flow of a minute current can be maintained, and when the latch relay is not normally turned off due to an unexpected error, the latch relay is forcibly turned off through the current stored in the super capacitor in advance. The present invention relates to a latch relay capable of real-time state control, a method for controlling the state of the latch relay, and a battery pack including a latch relay capable of real-time state control.

Generally, battery systems that require high voltage and large capacity, such as electric vehicles or energy storage systems (ESS), are protected by switching elements such as relays.

When such a switching element cannot be driven normally due to various failure modes, the switch protection element, the drive circuit, and the wiring are included to protect the battery system, and the circuit is stably cut off against the failure mode. There is a need for a protective device that can be used.

On the other hand, in the case of a general relay used at this time, the ON state is maintained when the current is continuously conducted, and the OFF state is maintained when the current is not conducted, which consumes power. In order to prevent this, a latch relay (LATCH RELAY) may be used instead of a general relay.

The latch relay is composed of a combination of an electromagnet and a permanent magnet. If the positive and negative electrodes are separated (OPEN) and the iron plate is pulled by the magnetic force of the electromagnet and the contacts stick to each other, the state is maintained by the magnetic force of the permanent magnet. do. Temporarily, in order to release the bonded state of the iron plate, the magnetic force of the permanent magnet is canceled by applying the magnetic force of the electromagnet so as to go in the opposite direction, and the contact point between the positive electrode and the negative electrode is eliminated.

Latch relays using such a principle have the advantage of low power consumption, but the power supplied to the latch relay is lost, or the reset coil (REST) for making the latch relay in the OFF state is lost. If the COIL) fails or the wiring is cut due to some other failure, the problem of not being able to deal with the dangerous situation of the battery arises.

The present invention has been derived to solve the above-mentioned problems. When the latch relay is turned on, the normal operating state is monitored in real time through whether or not the flow of a minute current can be maintained, and the latch relay is caused by an unexpected error. A latch relay capable of real-time state control, a state control method of the latch relay, and a real-time state that force the latch relay to turn off through a current stored in the super capacitor when the off operation is not performed normally. Attempts to provide battery packs that include state controllable latch relays.

The latch relay capable of real-time state control according to one embodiment of the present invention has an off-coil portion located adjacent to the positive electrode and negative electrode contacts, an on-coil portion located adjacent to the positive electrode and negative electrode contacts, an off-coil portion, and an intermediate between the on-coil portion. The off-coil section is turned on (including an additional control section that is connected by and controls the on / off operation of the off-coil section, and a current storage section that stores the current supplied from the on-coil section and supplies the stored current to the additional control section. If the off-coil section does not operate normally in a situation where ON) operation is required, the additional control section operates ON by applying the current stored in the current storage section to the off-coil section. The connection state between the positive electrode and the negative electrode contacts is turned ON, and the positive electrode and the negative electrode contacts are opened to each other.

In one embodiment, the present invention further includes a determination unit for determining whether or not a first current is applied from the off-coil portion to the positive electrode and negative electrode contacts during the ON operation of the off-coil portion. As a result of the judgment, when it is judged that the first current is not applied in the on-operating state of the off-coil part, the judgment part causes the current stored in the current storage part to be applied to the additional control part, so that the off-coil part and the positive electrode are applied. It is characterized in that the connection state between the and the negative electrode contact is turned on.

In one embodiment, the current value of the first current is smaller than the current value of the current applied from the on-coil portion to the positive electrode and negative electrode contacts.

In one embodiment, the current storage unit may be periodically charged through a current periodically supplied from the on-coil unit.

In one embodiment, the current storage unit may be a supercapacitor (SUPER CAPACITOR).

In the real-time state control method of the latch relay according to another embodiment of the present invention, among the off-coil portion and the on-coil portion located adjacent to the positive electrode and negative electrode contacts, the on-coil portion is turned on (ON) through the current storage portion. If the off-coil section does not operate normally in the step of storing the current supplied from the on-control and the off-coil section needs to be turned on, the current stored in the current control section is placed between the off-coil section and the on-coil section. The step of applying to the additional control unit connected to the above and the additional control unit operate ON (ON), and the connection state between the off-coil unit and the positive electrode and negative electrode contacts is turned ON (ON), and the positive electrode and negative electrode contacts are turned on. Includes steps in which are OPENed to each other.

In one embodiment, in the present invention, when the off-coil portion is turned on, the first current is applied from the off-coil portion to the positive electrode and negative electrode contacts, and the first current is applied through the determination unit. It may further include a step of determining whether the state is maintained.

In one embodiment, the step of storing the current supplied from the on-control may include the step of periodically charging the current storage unit through the current periodically supplied from the on-coil unit.

Battery packs according to yet other embodiments of the present invention
The battery module and the off-coil section located adjacent to the positive and negative electrodes of the battery module, the on-coil section located adjacent to the positive and negative contacts, the off-coil section and the on-coil section are connected in the middle to operate the off-coil section on and off. The off-coil unit includes an additional control unit to be controlled and a current storage unit that stores the current supplied from the on-coil unit and supplies the stored current to the additional control unit. If does not operate normally, the current stored in the current storage unit is applied to the additional control unit to turn the additional control unit ON (ON), and between the off-coil unit and the positive and negative electrode contacts of the battery module. Includes a latch relay that allows the positive and negative contacts of the battery module to be opened to each other when the connected state of the battery module is turned on.

According to one aspect of the present invention, there is an advantage that the presence or absence of power loss of the circuit can be confirmed in advance by monitoring the normal operation state in real time through whether or not the flow of a minute current can be maintained during the ON operation of the latch relay.

Further, according to one aspect of the present invention, when the latch relay is not normally turned off due to an unexpected error, the latch relay is forcibly turned off through the current stored in the supercapacitor in advance. This has the advantage that the circuit can be quickly interrupted in dangerous situations.

It is a figure which shows roughly the structure of the conventional general latch relay 1. It is a figure which shows typically the structure of the latch relay 100 which can perform real-time state control by one Embodiment of this invention. It is a figure which shows the process of controlling the state of the latch relay 100 which can perform the real-time state control shown in FIG. 2 in the order of a series.

In the following, preferred embodiments are presented to aid understanding of the present invention. However, the following embodiments are provided only for easier understanding of the present invention, and the contents of the present invention are not limited by the present embodiments.

FIG. 1 is a diagram schematically showing a configuration of a conventional general latch relay 1.

Referring to FIG. 1, in the case of a general latch relay 1, an off control unit (off control) 1a for off control, an on control unit (on control) 1b for on control, and positive and negative electrode contacts. It is configured to include 1c and.

At this time, when the current is conducted for a certain critical time (for example, 50 to 100 ms) via the on-control unit 1b, the positive electrode and the negative electrode are attached to each other by the iron plates connecting the positive electrode and the negative electrode contacts by the electromagnet. It is connected and the bonded state of the iron plate is maintained by the permanent magnet.

Further, when a current is conducted through the off-control unit 1a for a certain critical time (for example, 50 to 100 ms), a magnetic force in the opposite direction for canceling the magnetic force of the permanent magnet is generated, whereby the magnetic force in the opposite direction is generated. The iron plate is separated from the positive electrode and negative electrode contacts to eliminate current conduction.

However, in the case of such a conventional general latch relay 1, the off-control unit 1a may not operate normally due to a power loss, a failure of the off-control unit 1a or the on-control unit 1b, a disconnection, or the like. .. This causes a problem that the latch relay 1, which is a switching element, is somewhat unreliable in that it is difficult to guarantee the safety of circuit interruption.

FIG. 2 is a diagram schematically showing a configuration of a latch relay 100 capable of real-time state control according to an embodiment of the present invention.

Referring to FIG. 2, the latch relay 100 capable of real-time state control according to one embodiment of the present invention is large and includes an off-coil unit 110, an on-coil unit 120, an additional control unit 130, and a current storage unit 140. In one embodiment, the determination unit 150 can be further included.

First, the off-coil portion 110 is located adjacent to the positive electrode and negative electrode contacts 200, and serves to release (or open, open) the bonded state of the iron plates contained in the positive electrode and negative electrode contacts 200.

Such an off-coil unit 110 is connected to each other via an on-coil unit 120 and an additional control unit 130, and an on / off operation is controlled by the additional control unit 130.

The off-coil portion 110 continuously applies a first current, which is a minute current, to the positive electrode and the negative electrode contacts 200 in a state where the positive electrode and the negative electrode contacts 200 are connected to each other, and the determination unit 150 continuously applies such a first current. Determine if it is applied.

If, as a result of the determination of the determination unit 150, it is determined that the first current is not applied to the positive electrode and negative electrode contacts 200 via the off-coil unit 110, the current stored in the current storage unit 140 is applied to the additional control unit 130. To do so.

At this time, the current value of the first current has a current value smaller than the current value required for turning on the positive electrode and negative electrode contacts 200, and the determination unit 150 continuously conducts such a first current value. Check in real time whether or not it is.

The on-coil portion 120 is located adjacent to the positive electrode and negative electrode contacts 200 in a state of being aligned with the off-coil portion 110, and serves to close the bonded state of the iron plates contained in the positive electrode and negative electrode contacts 200.

By including a permanent magnet (not shown) in such an on-coil portion 120, when the positive electrode and the negative electrode contacts 200 are connected by the on-coil portion 120, the connected state of the positive electrode and the negative electrode contacts 200 is maintained by the permanent magnet.

On the other hand, the current storage unit 140 is charged by receiving a periodic current supply from the on-coil unit 120 (or is charged through the periodic generation of oncurent), but as an example, the current storage unit 140 is a supercapacitor. Can be done.

Therefore, the determination unit 150 can monitor in real time whether or not the off-coil unit 110 is operating normally by confirming the continuous continuity state of the first current, and the current storage unit can be used even when the off-coil unit 110 fails. By operating the additional control unit 130 through the current stored in the 140 in advance, it is possible to have the effect that the off-coil unit 110 is operating normally.

Next, with reference to FIG. 3, a process for controlling the state of such a latch relay 100 will be described in order.

FIG. 3 is a diagram showing a process of controlling the state of the latch relay 100 capable of real-time state control shown in FIG. 2 in a series of order.

Referring to FIG. 3, first, the positive electrode and the negative electrode contacts are connected by the on-coil section operating on, and the current storage section is charged while storing the current supplied from the on-coil section (S301).

Next, the determination unit determines whether or not the first current is normally applied from the off-coil portion to the positive electrode and negative electrode contacts (S302).

If the off-coil section does not operate normally in a situation where the off-coil section needs to be turned on (for example, when the first current is not applied, the controller operation moves, the wire breaks, etc.), the current stored in the current control section is added. When applied to the control unit (S303), the additional control unit is turned on, the connection state between the off-coil unit and the positive electrode and negative electrode contacts is turned on (ON), and the positive electrode and negative electrode contacts are opened to each other (OPEN). (S304).

On the other hand, in another embodiment, the present invention can include a battery pack including the latch relay 100 as described above.

More specifically, the off-coil portion 110 and the on-coil portion 120 are located adjacent to the positive electrode and negative electrode contacts of a battery module (not shown) composed of a plurality of battery cells, and such a latch relay 100 is one. It consists of two units and is included in the battery pack.

Although the above description has been made with reference to the preferred embodiments of the present invention, those skilled in the art will be able to do so within the scope of the ideas and domains of the present invention described in the claims below. It will be appreciated that the present invention can be modified and modified in various ways.

Claims (14)

The off-coil section located adjacent to the positive and negative electrode contacts,
An on-coil portion located adjacent to the positive electrode and negative electrode contacts, and
An additional control unit that is connected in the middle between the off-coil portion and the on-coil portion and controls the on / off operation of the off-coil portion .
With
If the Ofukoiru unit ON operation is required condition of the Ofukoiru part does not work properly, before SL addition controller, wherein by turning on the connection state between the positive electrode and the negative electrode contact and the Ofukoiru portion Operates on to open the positive and negative contacts to each other,
Latch relay capable of real-time state control. A current storage unit for storing the current supplied from the on-coil unit is provided.
The additional control unit applies a current stored in the current storage unit.
The latch relay capable of real-time state control according to claim 1. During on-operation of the Onkoiru portion, e Bei a determining section for determining whether to apply a first current to the positive and negative contacts from the Ofukoiru unit,
When it is determined as a result of the determination of the determination unit that the first current is not applied in the on-operating state of the on-coil unit, the determination unit applies the current stored in the current storage unit to the additional control unit. In this way, the connection state between the off-coil portion and the positive electrode and negative electrode contacts is turned on.
The latch relay capable of real-time state control according to claim 2. The current value of the first current is
It is smaller than the current value of the current required for the on-operation of the positive electrode and negative electrode contacts.
The latch relay capable of real-time state control according to claim 3. The current storage unit
It is charged periodically through the current periodically supplied from the on-coil portion.
The latch relay capable of real-time state control according to any one of claims 2 to 4. The current storage unit
Supercapacitor,
The latch relay capable of real-time state control according to any one of claims 2 to 5. The judgment unit
When it is determined that the first current is not applied in the on-coil unit on-operating state, the current stored in the current storage unit is applied to the additional control unit so that the contact state of the additional control unit is applied. Is physically changed from open to closed,
The latch relay capable of real-time state control according to claim 3 or 4. The additional control unit
A switching element,
The latch relay capable of real-time state control according to any one of claims 1 to 7. Of Ofukoiru portion and Onkoiru portion located adjacent to the positive electrode and the negative electrode contact, before Symbol if the Ofukoiru part in Ofukoiru portion of the on-operation is required situation does not operate normally, halfway between the Onkoiru portion front Symbol Ofukoiru unit The step that the additional control unit connected to is turned on , and
A step of the positive and negative contacts connected state is turned on between the front Symbol Ofukoiru part the positive electrode and the negative electrode contacts are opened to each other,
A real-time state control method for latch relays. A step of storing the current supplied from the on-coil section via the current storage section when the on-coil section is turned on is provided.
The step in which the additional control unit is turned on includes a step of applying the current stored in the current storage unit to the additional control unit.
The real-time state control method for a latch relay according to claim 9. A step of applying a first current from the off-coil portion to the positive electrode and negative electrode contacts when the on-coil portion is on.
A step of determining whether or not the state in which the first current is applied is maintained via the determination unit, and
Further prepare,
The real-time state control method for a latch relay according to claim 9 or 10. The determination unit includes a step of turning on the additional control unit when it is determined that the first current is not applied.
The real-time state control method for a latch relay according to claim 11. The step of storing the current supplied from the on-coil portion is
The step includes a step in which the current storage unit is periodically charged through a current periodically supplied from the on-coil unit.
The real-time state control method for a latch relay according to claim 10. Battery module and
An off-coil portion located adjacent to the positive electrode and negative electrode contacts of the battery module, and
An on-coil portion located adjacent to the positive electrode and negative electrode contacts of the battery module, and
An additional control unit that is connected in the middle between the off-coil portion and the on-coil portion and controls the on / off operation of the off-coil portion.
A current storage unit that stores the current supplied from the on-coil unit and supplies the stored current to the additional control unit.
Including
When the off-coil section does not operate normally in a situation where the off-coil section needs to be turned on, the additional control section is turned on by applying the current stored in the current storage section to the additional control section. The connection state between the off-coil portion and the positive electrode and negative electrode contacts of the battery module is turned on so that the positive electrode and negative electrode contacts of the battery module are opened to each other.
With a latch relay
To prepare
battery pack.

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